Can't find mms photos once downloaded

i use he sms go pro app, when i save pics they do not go to my gallery, i have to remake my preinstalled messaging app my default to save. never had an issue until i got the lg v10? i am told the photo was saved but cant find it on my phone anywhere

don't know about sms go pro, but I use Textra and when I save a pic from a text it is saved in the Gallery in a Textra folder. Using the default messaging app, the pics were saved in a Download folder in the Gallery